This paper provides an extended exploration of the inverse-chirp gravitational-wave signals from stellar collapse in massive scalar-tensor gravity reported in [Phys. Rev. Lett. 119, 201103PRLTAO0031-900710.1103/PhysRevLett.119.201103]. We systematically explore the parameter space that characterizes the progenitor stars, the equation of state, and the scalar-tensor theory of the core collapse events. We identify a remarkably simple and straightforward classification scheme of the resulting collapse events. For any given set of parameters, the collapse leads to one of three end states: a weakly scalarized neutron star, a strongly scalarized neutron star, or a black hole, possibly formed in multiple stages. The latter two end states can lead to strong gravitational-wave signals that may be detectable in present continuous-wave searches with ground-based detectors. We identify a very sharp boundary in the parameter space that separates events with strong gravitational-wave emission from those with negligible radiation.

Rosca-Mead, R., Sperhake, U., Moore, C., Agathos, M., Gerosa, D., Ott, C. (2020). Core collapse in massive scalar-tensor gravity. PHYSICAL REVIEW D, 102(4) [10.1103/PhysRevD.102.044010].

Core collapse in massive scalar-tensor gravity

Gerosa D.;
2020

Abstract

This paper provides an extended exploration of the inverse-chirp gravitational-wave signals from stellar collapse in massive scalar-tensor gravity reported in [Phys. Rev. Lett. 119, 201103PRLTAO0031-900710.1103/PhysRevLett.119.201103]. We systematically explore the parameter space that characterizes the progenitor stars, the equation of state, and the scalar-tensor theory of the core collapse events. We identify a remarkably simple and straightforward classification scheme of the resulting collapse events. For any given set of parameters, the collapse leads to one of three end states: a weakly scalarized neutron star, a strongly scalarized neutron star, or a black hole, possibly formed in multiple stages. The latter two end states can lead to strong gravitational-wave signals that may be detectable in present continuous-wave searches with ground-based detectors. We identify a very sharp boundary in the parameter space that separates events with strong gravitational-wave emission from those with negligible radiation.
Articolo in rivista - Articolo scientifico
black holes, gravitational waves, general relativity, relativistic astrophysics
English
2020
102
4
044010
none
Rosca-Mead, R., Sperhake, U., Moore, C., Agathos, M., Gerosa, D., Ott, C. (2020). Core collapse in massive scalar-tensor gravity. PHYSICAL REVIEW D, 102(4) [10.1103/PhysRevD.102.044010].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/325588
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